Thanks for the link, I wasn't sure what exactly to include for this. That helps a lot for future reference. I've included screenshots of my system Properties and Render Settings, along with what MediaInfo had to say about the first draft of the video versus the "corrupted" one. I included Sheet and Tree versions of the latter since that was the only way it could be viewed::

Original Video

After rendering the second time

@Belle Someone will give you more info but in MediaInfo, if you click View at the top, choose Text,

It'll look like this, right click, select all & copy, you can then paste it in a comment here,

one thing from your pics is, the MediaInfo pic you posted says 29.97fps, your project says 29.97fps also but the render setting that's highlighted is 60i, you want the one above that says Internet HD 1080p 29.97 fps,

If you look at the bottom of this comment, Signature, you can fill yours in by clicking the your icon at the top, click it - My Profile, & fill in your Signature with your Vegas version, Windows version & system specs, CPU, GPU, RAM etc. this will then show at the bottom of the comments & will help people help you 👍

@Belle Someone will give you more info but in MediaInfo, if you click View at the top, choose Text,

It'll look like this, right click, select all & copy, you can then paste it in a comment here,

one thing from your pics is, the MediaInfo pic you posted says 29.97fps, your project says 29.97fps also but the render setting that's highlighted is 60i, you want the one above that says Internet HD 1080p 29.97 fps,

If you look at the bottom of this comment, Signature, you can fill yours in by clicking the your icon at the top, click it - My Profile, & fill in your Signature with your Vegas version, Windows version & system specs, CPU, GPU, RAM etc. this will then show at the bottom of the comments & will help people help you 👍

 

All right, I think I've put in all that's needed. Please let me know if anything is missing, thank you for your help.

Where's the MediaInfo as shown by Gid?

@Belle

"Please let me know if anything is missing, thank you for your help."

MediaInfo Text View has all the information that others need to help. Text in a Code Block is the neatest way to deliver the data.

This is Howie Doit...

Any reason for rendering a progressive project to interlaced? The not playable file has 0 byte file size according your media info screenshots. Do you get an error message when trying to render?

@Belle

"Please let me know if anything is missing, thank you for your help."

MediaInfo Text View has all the information that others need to help. Text in a Code Block is the neatest way to deliver the data.

This is Howie Doit...

 

Darn, my bad guys, I got focused on filling in my Signature and forgot to include what this post is for. This is what MediaInfo had to say about the original video:

General
Complete name                            : C:\Users\HP\Videos\Epic Opera VGM.mp4
Format                                   : MPEG-4
Format profile                           : Base Media / Version 2
Codec ID                                 : mp42 (isom/mp42)
File size                                : 3.82 GiB
Duration                                 : 1 h 1 min
Overall bit rate mode                    : Variable
Overall bit rate                         : 8 967 kb/s
Encoded date                             : UTC 2022-01-15 19:22:34
Tagged date                              : UTC 2022-01-15 19:22:34

Video
ID                                       : 2
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Main@L4
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 1 h 1 min
Bit rate mode                            : Variable
Bit rate                                 : 8 773 kb/s
Maximum bit rate                         : 24.0 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 (30000/1001) FPS
Standard                                 : NTSC
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan type, store method                  : Separated fields
Scan order                               : Top Field First
Bits/(Pixel*Frame)                       : 0.141
Stream size                              : 3.74 GiB (98%)
Language                                 : English
Encoded date                             : UTC 2022-01-15 19:22:42
Tagged date                              : UTC 2022-01-15 19:22:42
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : avcC

Audio
ID                                       : 1
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 1 h 1 min
Bit rate mode                            : Variable
Bit rate                                 : 192 kb/s
Maximum bit rate                         : 513 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 82.7 MiB (2%)
Language                                 : English
Encoded date                             : UTC 2022-01-15 19:22:34
Tagged date                              : UTC 2022-01-15 19:22:34

And this is what it had to say about the "corrupted" one:

General
Complete name                            : C:\Users\HP\Videos\Epic Opera VGM (Final).mp4
File size                                : 0.00 Byte

Any reason for rendering a progressive project to interlaced? The not playable file has 0 byte file size according your media info screenshots. Do you get an error message when trying to render?

Nothing pops up during the render process, I only run into the problem when trying to watch or email the final thing. Would you mind elaborating on "rendering a progressive project to interlaced?" I haven't heard of that before.